MUON
| Date | Clue |
|---|---|
| 2023-11-26 | Subatomic particle |
| 2020-02-22 | Unstable subatomic particle |
| 2018-05-05 | Unstable subatomic particle |
| 2013-12-06 | Subatomic particle more massive than an electron |
| 2011-02-06 | Unstable particle |
| 2009-12-04 | Unstable particle |
| 2007-12-17 | Elementary particle |
| 2007-08-26 | Particle created by a cosmic ray |
| 2006-05-22 | Atomic particle |
| 2005-09-02 | Unstable lepton |
| 2004-03-05 | Unstable particle |
| 2000-01-30 | Unstable particle |
| 1999-12-26 | Elementary particle |
| 1997-08-07 | Physics particle |